Paper-cutter.



F. E. BURNS.

PAPER CUTTER. APPLICATION I'ILBD rm. 9, 1914.

Patented Jan. 19, 1915.

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YHE NORRIS PETERS CO.. PHOTOilTHOU WASHINGTON, D. C.

FRANCIS E. BUR-NS, OF SAN FRANCISCO. CALIFORNIA.

PAPER-CUTTER.

Application fiied February 9, 1914.

To all whom it may concern.

Be itknown that I, FRANCIS E. BURNS, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented a new and useful Improvement in Paper-Cutters, of which the following is a specification.

My invention relates to paper cutters wherein a hand block is arranged to ride on the usual paper cutters straight edge, the said block being provided with a rotary cutting disk which follows the edge of the straight edge and cuts the paper thereunder, and the objects of my invention are first, to provide an improved paper cutter which may be easily held in alinement with the edge of the straight edge; second, to provide an inclosed rotary cutting disk for the purpose of preventing the operator from being accidentally out; third, to provide a cutting disk which may be easily removed for sharpening or renewal; and fourth, to provide means for rigidly securing the cutting disk in proper position.

I accomplish these several features by means of the device disclosed in the draw ings forming a part of the present specification wherein like characters of reference designate similar parts throughout the said specification and drawings, and in which- Figure 1 is a longitudinal sectional view of the device disclosing the rotary cutting disk rotatably mounted Within a recess in one of the side runners. Fig. 2 is a bottom view of the device disclosing the slide which holds the disk and its bearing in position. and the manner in which the disk is mount ed within a shallow recess within one of the side runners of the block. Fig. 3 is a transverse sectional view of the device disclosing the manner in which the bearing of the ro-- tary cutting disk is rigidly secured by means of a slide within the block, the device being shown riding on a straight edge with the rotary cutter cutting several layers of paper. l

Referring to the drawings, the numeral 1 is used to designate a rectangular hand block having a side piece 2 the lower portion of which is bent upon itself to form a runner 3. The side piece 2, after being bent to form the runner 3, is continued to form the connection 4: between the runner 3 and a Specification of Letters Patent.

Patented Jan. 19, 1915. Serial No. 819,098.

similar runner 3 having an open portion on the other side of the block 1, the P'IPPOSG of which will hereinafter be more fully described. A second piece 5 is detachably secured to the opposite side of the block 1 and is continuous throughout that side of the block so as to form a recess with the open portion of the runner 3.

The connection 4 is provided with a slot 6 having internally beveled edges within which is slidably mounted a slide 7. The block 1 is recessed above the slide as at 8. The under side of the bearing 9 is inclined as at 10. Within the bearing 9 is rotatably mounted the shaft 12 of the rotary cutting disk .14.

The outer end of the shaft 12 rests against the second side piece 5 while there is a very slight clearance between the side of the rotary cutting disk l t and the said piece 5 so as to permit the said disk to ro tate freely.

Suitable metal strips 15 are usually bound to the sides of the straight edge 16 for the purpose of preventing wear. The strips 15 are usually of a thickness which will permit the edges of the said strips to extend beyond the surfaces of the straight edge 16, thus forming runners upon which the present cutter is arranged to slide.

The operation is as follows. The straight edge 16 is placed upon the paper 17 so that one edge will coincide with the edge to be cut. The hand block 1 is placed upon the straight edge 16 as illustrated in Fig. 3 of the drawings, that is, so that the runners 3 and 3 of the said block 1 will lie on either s de of the strips 15. The distance between the internal surfaces of the runners 3 and 3 is very slightly in excess of the distance between the outer surfaces of the strips 15 so that the block 1 may easily slide thereon but will be capable of little or no lateral movement. This will bring the internal surface of the rotary cutting disk 1% in alineinent with the outersurface of the adjacent strip 15 of the straight edge 16. As the periphery or cutting edge of the rotary cutting disk 14 extends beyond the edge of the runner 3 and second side piece 5, and also below the edge of the strip 15, it is evident that by running or sliding the block 1 throughout the length of the straight edge ing.

which may be easily 16, the rotary cutting disk 14: will cut through the paper along the edge of the straight edge 16 and by reason of therunners 3 and 3 which confine the block 1 to the straight edge 16, the rotary cutting disk 1 L cannot be diverted from the edge of the straight edge 16.

The rotary disk sharpening or renewal by 7 toward the center of the block 1 until the end of the said slide clears the recess 8 within which rests the bearing 9 of the disk 14:, after which the said bearing and the disk 14: may be easily removed.

Inreplacing the bearing 9 and the disk 1 1, the inclined side 10 is placed where it will lie adjacent to the slide 7 when it is replaced. When the slide 7 is replaced, the inner surface thereof engages the inclined surface 10 of the bearing 9 and forces the same tightly into the recess. In this manner the bearing 9 and consequently the disk 1 is rigidly held in proper position while the slide 7 is closed.

The connection 14 may be removed for moving the slide a between the runners u and 3 is provided so as to always IBtzllll.

substantially the same distance between the internal surfaces of the said runners 3 and 3, which as hereinbefore described, is slightly in excess of the distance between the outer surfaces of the strips 15 of a standard straight edge 16.

The bearing 9 and the disk 14: rotatably mounted therein are removable for the purpose of removing accumulated paste from the said cutter 14; or for renewing or sharpening the said cutter 14:. V

The disk 1 1 is hooded by being placed within the recess formed by the open portion of the runner 3 and the second piece 5. Gonsequentlythere is no danger of the operator being accidentally cut when operat- The second piece 5 is detachably secured. to the block 1 in'order that the said piece 5 may be removed for the purpose of removing accumulated paste or other debris from the recess within which the rotary disk is mounted.

It is obvious from the foregoing that I have provided an improved paper cutter held in alinement with the edge of the straight edge. Also an inciosed rotary cutting disk for cutting wall paper and the like which is easily removable .for cleaning, sharpening or renewal purposes as well as means for rigidly securing the removable cutter in proper position;

Having thus described my invention what Copies of this patent may be obtained for .I claim as new and desire to secure by Letters Patent is-.

1. A rotary paper cutter comprising a suitable rectangular hand block having a recess therein; a side piece secured to one side of the said block and bent to form a runner on each side of the block and a connection between the runners, one of the runners having an open portion therein; a second side piece secured to the opposite side of the block and arranged to form a recess with the open portion in one of the runners; a suitable bearing having an inclined surface thereon within the recess in the hand block; meansarranged to rigidly secure the bearing'within the recess in the hand block; and a rotary cutting disk within the recess formedby the second side piece and the open portion in one of the runners androtatably mounted within the bearing in'the hand block and arranged with its cutting edge in 'alinement with the internal surface of the said runner.

2. In a rotary paper cutter, the combination of a suitable rectangular hand block having a recess in the under side thereof; a side piece secured to block and bent to form a runner on each side of the said block and a connection between the runners having a slot with beveled edges thereinarranged to lie adjacent to the recess within the hand block, the runner opposite the side piece having an open portion therein; a second side piece secured to the opposite side of the hand block and arranged to form a recess with the open portion of the runner on that side; a suitable bearing within the recess in and having an inclined surface thereon: a slide within the slot of the connection between the runners arranged to engage the inclined surface of the bearing and to se cure the same rigidly within the recess within thehand block; a cutting disk arranged the side of the hand the hand block within thefrecess formed by the second side 'In'witness whereof I hereunto set rnv sig 7 block so that the cut-' nature inthe presence of two subscribing witnesses. V

' FRANCIS E. BURNS- v Witnesses: 1 r i J. A. RAMSAY,

, R. B. Bnrr'ram.

five cents each, by addressing the Commissioner of Patents, 7 Washington, 1). C. 1 

